This is an issue of the readings going off of the calibration lookup table. A slightly different location might help. The underlying issue is that there are factors in the tissue that the Moxy is not completely insensitive to. This could be things like skin color, inhomegeneities in the muscle, or any other factor that makes the light interact with the tissue differently than the model expects.

At really low SmO2, this can make the readings go off the edge of the table. The Moxy stops reporting values when this happens.

I'm looking at ways to make the sensor handle this situation more gracefully so there are no gaps in the data. I'm reluctant to just have it display a 0 or a 1% SmO2 because this is one of the factors we use to reject readings when the sensor is off tissue. I need to figure our how to know when we are just slightly off the lookup table or figure out how to expand the lookup table in this area in a way that makes sense.

Insert Photos

Web address (URL)

Image URL

If your URL is correct, you'll see an image preview here. Large images may take a few minutes to appear.
Remember: Using others' images on the web without their permission may be bad manners, or worse, copyright infringement.